On 7/1/24 11:15 AM, Tudor Ambarus wrote: > > > On 7/1/24 10:46 AM, Erez wrote: >> When using mx25l12805d, we do not read SFDP. >> As it uses the no-SFDP flags. >> When using mx25l12833f hardware with mx25l12805d driver, it did not >> try to read the SFDP. >> Yet mx25l12833f does have SFDP, when I remove the no-SFDP flags, the >> driver fetch the SFDP. >> >> Secondly SFDP does not contain OTP information. >> >> mx25l12805d has two OTP regions of 128 KiB and 384 KiB (yes asymmetric). >> While mx25l12833f has two OTP regions of 512 KiB. >> >> How do we handle it? > > You would first try to parse SFDP and initialize the flash based on > SFDP. If there's no SFDP then you fallback to the flags declared at > flash declaration. Esben had a try recently, see [1]. I don't know if > there's any progress in that direction. > And you can then decide which OTP org to use based on whether SFDP is present or not. > Also, you haven't mentioned anything about the testing. Do you have the > flash? > > [1] > https://lore.kernel.org/linux-mtd/20240603-macronix-mx25l3205d-fixups-v2-0-ff98da26835c@xxxxxxxxxx/
